Automatic E-mail Responder with Unique Replies once Payment has been Received!

Hi, I am looking for someone to help me install a script or program using microsoft outlook. To give you an understanding of exactly what I want to do, I'll tell you my aim and purpose for requesting this program. I am wanting to sell "CODES" on eBay. These codes are in the format of a number, about 20 digits long. I want the codes instantly delivered to my buyer. So when a user buys an item from me on ebay (one of the codes) and pays for it via paypal, I receive an e-mail from paypal stating I have received the funds. I want the script/program to recognize this e-mail, extract the e-mail address from it and mail that e-mail address the CODE. I want to have a list of codes eg: 123456 789101 121314 151617 181920 212223 So when I receive the first e-mail that payment has been received, it e-mails that user the first code (123456). The next e-mail I receive of someone buying the code from me it sends them (789101). So on and so forth. I would like the code to be backed up but deleted from the list, and an easy way for me to add more codes to the list when I receive them. eg. I start with 6 codes. Three sell. There is a list remaining of: 151617 181920 212223 And a backed up list that states: 123456 789101 121314 Where email1,2, are the e-mails the codes were sent out to. I will regularly be adding more codes and selling quite a few of these codes. I am sure this is a pretty simple script that could be written in a short period of time. I'd like to find someone who would do this for cheap. It doesn't have to be anything fancy, as long as it is bug-free and gets the job done. If the lists are updated in notepad, that's fine. Thanks!